FR2979504A3 - Method for processing radio signal received by multimedia system's radio receiver in motor vehicle, involves selecting input corresponding to identification code in correspondence table and extracting output associated with input from table - Google Patents

Abstract

The method involves reading an identification code (C1) contained in a radio signal (S1), and determining display data (D11, D21, D22, D31, D32) associated with the code and related to a radio broadcasting station of the code. A correspondence table (25) is read in a database (23) on an electronic memory (24), where the table associates an output (S) of the table formed by the display data with an input (E) of the table formed by the code. The input corresponding to the code is selected in the table, and the output associated with the selected input is extracted from the table. Independent claims are also included for the following: (1) a radio receiver (2) a multimedia system.

Description

TECHNICAL FIELD OF THE INVENTION The invention relates to the field of the processing of radio signals answering the RDS standard, corresponding to the English name "Radio Data System", after their reception by a receiver. radio, for example car radio type boarded in a motor vehicle. This treatment applied to each radio signal is intended in particular to allow a display of information relating to the broadcasting station transmitting the signal. It is also possible to draw up a list of the stations available for listening in order then to allow a selection from this list of the desired station tuned, or even to practice an active search station. The subject of the invention is more particularly a method of processing a radio signal complying with the RDS standard received by a radio receiver, as well as a computer medium implementing the processing method. It also relates to a radio receiver comprising a processing unit which implements the processing method, a multimedia system comprising such a radio receiver, and a motor vehicle equipped with such a multimedia system, and an electronic memory. State of the art The RDS standard has been known since the beginning of the 1990s. It is particularly intended for motorists, to facilitate their listening to broadcasting stations during their journey. For this, the RDS signals also include coded information that adds additional functionality (in addition to listening to the station itself) at appropriately equipped receivers.

FIG. 1 thus illustrates the architecture of a radio system corresponding to the RDS standard according to the state of the art. Each RDS signal 11 is emitted at a transmitter 10. The signal 11 is transmitted in the form of a radio wave comprising an audio part to which digital data are added, conferring additional functionalities, among which: a code of 'PI' identification of the hexadecimal type (for the English name 'Program Identification') assigned individually to the broadcasting station transmitting the signal, - a text message 'RT' (for the English name 'Radio text') which allows the broadcast of texts at the request of the broadcasting station, including for example the content of the program and / or the title of the song and / or the name of the artist being listened to, a field "PSName" 13 (for the English name "Program Service Name"), intended to contain the name of the broadcasting station. Except in special cases, all broadcasting stations offer this functionality.

An operation proposed by the radio receivers 12 of the state of the art consists in displaying on a display device 14 the "PSName" parameter of the RDS signal whose audio part is listening. For this, when the radio receiver 12 broadcasts the audio portion of an RDS signal transmitted by a broadcasting station, the radio receiver 12 reads the name of the station represented by the "PSName" parameter contained in the RDS signal, and then transmits 15 this name to the display device 14 for display. According to a known optional operation, generally in the terminology of "list mode", a processing consists in applying the above principle to all the RDS radio signals that the radio receiver 12 receives, in order to display on the device 14 a list 16 listing all the names of the stations accessible by the receiver 12, from the set of "PSName" fields contained in the set of processed RDS signals, theoretically that this list 16 can display all the names of radio stations available to listen. A problem with the prior art of the prior art lies in the fact that a number of broadcasting stations have hijacked this "PSName" service in order to pass dynamic information instead of the name of the station. for example the content of the program being listened to and / or the title of the song and / or the name of the artist being listened to. As a result, the "list mode" for searching a station name has become unusable, because the list 16, instead of incorporating as required by the standard's recommended use of station names, displays the name of the station. often opposite one or more different display data, such as an artist name and / or song that is broadcast on the frequency corresponding to the station. For example in Figure 1, the displayed line "Madonna" contained in the list 16 obviously corresponds to an artist name and not to a broadcasting station name. Similarly, the "Happy" line contained in the list 16 corresponds to a part of a song name for example and not to a broadcasting station name. This problem arises even in the absence of the "list mode" when only the name of the station being listened to is intended to be displayed individually, because the displayed name can likewise not correspond to the name of the station . OBJECT OF THE INVENTION The object of the invention is to propose a solution for processing at least one signal meeting the RDS standard that makes it possible to remedy these drawbacks.

A first object of the invention is to provide a processing solution that ultimately ensures reliably the fact that the name displayed in relation to a radio station corresponds to the real name of this station.

A second object of the invention is to provide a processing solution that ultimately allows to continue to use appropriately the principle of "list mode" described above. A third object of the invention is to provide a processing solution that enriches the display data, in addition to the name of the station. A first aspect of the invention relates to a method of processing at least one radio signal complying with the "Radio Data System" standard received by a radio receiver, the radio signal being organized in several fields, one of which is constituted by a identification code assigned individually to a broadcasting station transmitting the signal. The method comprises a first step of reading the identification code contained in the radio signal and then a second step of determining, from the identification code, at least one display data item associated with the identification and relative code. to the corresponding broadcasting station. The second determining step comprises a first substep of reading in a database on an electronic memory of a correspondence table associating with each entry of the table consisting of a given identification code an output of the table constituted by at least one display datum, and a second substep of selection in the table of the entry corresponding to the identification code read in the first reading step, and a third substep of extraction from the read table. the output associated with the input selected in the second substep, which corresponds to the display data. The display data may consist of the name of the broadcasting station and / or a visual logo representative of the broadcasting station.

The method may include a third step of displaying the display data determined in the second step. The method of processing may be to apply the above method to all radio signals meeting the "Radio Data System" standard that the radio receiver receives, the third step of displaying a list listing all the display data. determined in the set of second steps in order to visualize all available broadcasting stations.

A second aspect of the invention relates to a computer medium readable by a processing unit and on which is implemented a computer program comprising computer program code means for implementing the steps and / or substeps of a method. treatment as mentioned above.

A third aspect of the invention relates to a radio receiver, which comprises a reception antenna and processing unit which implements a processing method.

The radio receiver can thus comprise a reception antenna capable of receiving radio signals meeting the "Radio Data System" standard and being organized in several fields each containing a parameter one of which is constituted by an identification code assigned individually to a broadcasting station transmitting the signal, and transmitting the signals captured to the processing unit to implement a processing method from at least one of the signals received. The receiver may comprise a database stored on an electronic memory, containing a correspondence table associating with each entry of the table consisting of a given identification code an output of the table consisting of at least one display data item listed in the table, the receiver being configured so that the processing unit reads the table, selects an input and extracts an output.

The receiver may include a first human-machine interface for modifying and / or customizing output data of the table. A fourth aspect of the invention relates to a multimedia system, comprising a radio receiver as mentioned above able to determine at least one display data relating to a broadcasting station transmitting a signal picked up by the radio receiver, to from the identification code assigned individually to this station.

The multimedia system may include a display data display device determined by the receiver processing unit.

The multimedia system may include a second human-machine interface configured to allow a user to select at least one display data from a list of display data displayed at the display device to select the corresponding broadcast station. to the selected display data. The radio receiver may include the display device and / or the second man / machine interface. The multimedia system may comprise a database stored on an electronic memory external to the radio receiver, containing a correspondence table associating with each entry of the table constituted by a given identification code an output of the table consisting of at least one display data listed in the table, a means of communication between the database and the radio receiver allowing the processing unit of the radio receiver to read the table, select an input and extract an output . A fifth aspect of the invention relates to a motor vehicle equipped with a multimedia system as mentioned above. The vehicle may thus comprise a radio receiver as mentioned above, a display data display device, a database stored on an electronic memory and containing a correspondence table associating with each entry of the table constituted by an identification code given an output of the table consisting of at least one display data item listed in the table, the set being configured to allow the processing unit of the radio receiver to read the table, to select an entry and extract an output.

BRIEF DESCRIPTION OF THE DRAWINGS Other advantages and features will emerge more clearly from the following description of particular embodiments of the invention given by way of nonlimiting example and represented in the accompanying drawings, in which: FIG. 1 schematically illustrates the principle of processing a radio signal according to the prior art; FIG. 2 schematically represents the principle of processing a radio signal according to the invention; FIGS. 3 and 4 represent schematically respectively first and second embodiments of multimedia systems according to the invention. DESCRIPTION OF PREFERRED EMBODIMENTS OF THE INVENTION FIG. 2 depicts a multimedia system according to one embodiment of the invention, wherein a radio receiver 17 receives an RDS signal 11, which includes the parameter "PI" 19 (for Program Identification) which is an identification code assigned individually to the transmitting radio station. From the PI code, the radio receiver generates a display data (for example a name and / or a visual logo) relating to the transmitting station. Indeed the radio receiver 17 implements a radio signal processing method 11, which comprises a reading of this parameter "PI" in order to then determine from the identification code, in addition to information already classically determinable and possibly displayable, at least one display data associated with the identification code and relating to the corresponding broadcasting station. Then this display data thus determined is then transmitted 18 to the display device 14 to carry out its display. This display data corresponds to an identifier of the broadcasting station, such as its name and / or a visual logo representative of the broadcasting station.

FIG. 3 illustrates a first embodiment of a receiver 17, which comprises a reception antenna 20 which receives one or more radio signals 11 identified as Si (i varying here from 1 to 3), each comprising a parameter "PI". Each received signal is then transmitted 22 to a processing unit 21, which determines at least one display data from the identification code associated with the parameter "PI". Then, this display data is transmitted to a display 14, as illustrated by the arrow 18. The sound broadcast by the radio receiver 17 of the audio portion of the signal 11 received by the antenna 20, to a listener of the signal transmitting station 51, is symbolized by the arrow 26. With reference to FIGS. 2 and 3, the determination of the display data from the identification code is done by a reading in a stored database 23 on an electronic memory 24, comprising a correspondence table 25 associating with inputs E constituted by parameters PI corresponding to given identification codes C1, C2, C3 ..., outputs S constituted by respectively at least one datum d display D11, D21, D22, D31, D32. A selection in the table 25 of the entry E corresponding to the identification code "PI" received by the processing unit 21 is performed, to extract the display data corresponding to the output S associated with the input E as well. selected. The output S associated with each of the inputs E can comprise one or more data display (s), possibly configurable or modifiable by the user for example. As will be detailed below, the outputs S are stored by default in the receiver 17, with updates downloadable automatically or at the request of the user, or in a removable media type USB or other, including for update. For example, the output S associated with the input E constituted by the identification code C1 consists of a single display data D11, consisting for example of a name of the broadcasting station transmitting the RDS signal whose code "PI" is Cl. On the other hand, the output S associated with the input E constituted by the identification code C2 consists of two display data D21 and D22 which consist for example respectively of a name and a representative visual logo. of the broadcasting station transmitting the RDS signal whose code "PI" is C2. Similarly, the table 25 associates with the code marked C3 an output S comprising two display data D31 and D32 for example.

In the particular embodiment of FIG. 3, the radio receiver 17 comprises the database 23, the latter being stored on an electronic memory 24 internal to the receiver 17. The receiver 17 is configured so that its processing unit 21 reads the table 25 it integrates, selects an input E and extracts an output S. The read operations and selection are symbolized by the arrow 27. The extraction operation of the output S is symbolized by the arrow 28. However, with reference to the embodiment variant represented by FIG. 4, the database 23 which contains the correspondence table 25 is stored in an electronic memory 24 which is external to the radio receiver 17 and communicates with the radio receiver 17 by a means communication 29 (wired connection or any radio link, for example of the "Bluetooth" or "Wifi" type), possibly by a bus of CAN type) adapted to allow the unit of treatment 21 read table 25 and select an input E (arrow 30) and extract an output S (arrow 31). In an operation that may be called "list mode", the processing consists of applying collectively the treatment principle described above to all the radio signals Si. For example, in the case where the antenna 20 receives three independent RDS signals 51, S2 and S3, the processing then consists in applying to the signals S2 and S3 the processing already applied in the manner described in the signal 51. This is intended to display on the device 14 a list 32 (see FIG. each line lists the set of display data extracted from an output S of the correspondence table 25. Thus, each of its lines reliably and appropriately includes a display data item that truly corresponds to a datum relating to a station available (name and / or visual logo). The characters on the left of each of the lines of list 32 (respectively "Virgin Radio", "France Info", "Yes FM", "RTL", "France Culture") are indeed names relating to the stations emitting the signals, while that each of the lines of the list 32 comprises for example a right-hand character consisting of a visual logo representative of the station named by the character on the left. The display of the list 32 by a user is symbolized by the arrow marked 33. The display device 14 may be an integral part of the radio receiver 17 (FIG. 3) or may be outside the radio receiver 17 (FIG. 4). In the second case, any communication means (wired or radio link, possibly by a CAN bus) between the radio receiver 17 and the display device 14 may be provided. The choice that the display device 14 is integrated or not to the radio receiver 17 is dissociated from the choice to provide a database 23 internal or external to the receiver 17.

There may be provided a man-machine interface configured to allow a user to modify and / or customize S-output display data of the database table 23, regardless of the location of the database. 23. In the case of FIG. 3, a man / machine interface 34 is integrated with the receiver 17 to enable a user, by an action 41 on the interface 34, to modify and / or personalize display data by Also, such a man / machine interface may be external to the receiver 17 (reference 35 in FIG. 4). It can be provided for a direct transfer of information between the interface 35 and the database 23 (the same is true between the interface 34 and the database 23, this transfer of information being marked 36 on the FIG. 3), using any means of communication (wired or radio link, possibly by a bus of CAN type or of "USB" or "SD-Gard" type) or an indirect transfer of information, by resorting to to an intermediate interfacing element such as a computer server 42 remote from the receiver 17. The server 42 communicates with the interface 35 (arrow 44) and with the database 23 (arrow 43). In the particular case, but in no way exclusive (the invention being in fact applicable to any type of radio receiver such as a "smartphone" type telephone) where the receiver 17 is of car radio type on board a vehicle, thanks to at the server 42, the interface 35 may not be on board the vehicle. Thus, the database, whether embedded or not on board the vehicle, can be managed remotely by acting on the server 42 via the interface 35, these two elements can comprise or implement a computer, telephone, or any other means of database management and interfacing. The database can be built by the customer or made available on a website, which could offer regular updates, depending on the country.

Each of the multimedia systems of FIGS. 3 and 4 may furthermore comprise a man / machine interface 38 (internal to the receiver 17 in FIG. 3, external to the receiver in FIG. 4) configured to enable a user, by an action 40 on FIG. interface 38, select 39 at least one display data from the list 32 to select the broadcasting station corresponding to the selected display data. The memory 24 of FIG. 4 can take any possible form such as a hard disk, a removable storage key of the USB key type, an SD card-type storage card, or even a CD-type storage disk for "Compact disc "in Anglo-Saxon terminology, or telematics. In addition, the database 23 will respect a predefined format compatible with the processing unit 21. One of the applications targeted by the invention is the field of the automobile and consists in providing a motor vehicle equipped with a system multimedia as mentioned above. Finally, the receiver 17, or at least the multimedia system as a whole, may comprise a computer support readable by the processing unit 21, on which is recorded a computer program comprising computer program code means implementation steps and / or sub-steps of the treatment solution as mentioned above.

Claims (10)

REVENDICATIONS1. Method for processing at least one radio signal (S1, S2, S3) conforming to the "Radio Data System" standard received by a radio receiver (17), the radio signal being organized in several fields, one of which is constituted by an identification code (PI) assigned individually to a broadcasting station transmitting the signal, comprising a first step of reading the identification code contained in the radio signal and then a second determining step, from the identification code, of at least one display data item (D11, D21, D22, D31, D32) associated with the identification code and relating to the corresponding broadcasting station, characterized in that the second determination step comprises a first substep of reading in a database (23) on an electronic memory (24) of a correspondence table (25) associating with each input (E) of the table (25) constituted by a given identification code an output (S ) of the a table (25) consisting of at least one display data, and a second substep of selection in the table (25) of the input (E) corresponding to the identification code read in the first reading step, and a third extraction sub-step from the table (25) of the output associated with the input (E) selected in the second substep, which corresponds to the display data (D11, D21, D22, D31, D32). 2. Method according to claim 1, characterized in that the display data (D11, D21, D22, D31, D32) consists of the name of the broadcasting station and / or a visual logo representative of the broadcasting station. . 3. Method according to one of claims 1 and 2, characterized in that it comprises a third step of displaying the display data (D11, D21, D22, D31, D32) determined in the second step. 4. Processing method of applying the method of claim 3 to all radio signals meeting the standard "Radio Data System" that captures the radio receiver (17), the third step of displaying a list listing all display data (D11, D21, D22, D31, D32) determined in the set of second steps in order to view all the available broadcasting stations. 5. radio receiver (17), characterized in that it comprises a receiving antenna (20) and a processing unit (21) which implements a treatment method according to one of claims 1 to 4. 6. radio receiver according to claim 5, characterized in that it comprises a database (23) stored on an electronic memory (24), containing a correspondence table (25) associating with each entry (E) of the table (25) constituted by a given identification code an output (S) of the table (25) constituted by at least one display data item listed in the table (25), the receiver being configured so that the unit of process reads the table (25), selects an input (E) and extracts an output (S) and includes a first human-machine interface (34) for modifying and / or customizing output data of Table. 7. Multimedia system, comprising a radio receiver (17) according to one of claims 5 and 6 for determining at least one display data (D11, D21, D22, D31, D32) relating to a broadcasting station transmitting a signal picked up by the radio receiver (17), from the identification code assigned individually to this station. Multimedia system according to claim 7, characterized in that it comprises a display device (14) for display data determined by the processing unit (21) of the receiver and in that it comprises a second human-machine interface (38) configured to allow a user to select at least one display data (D11, D21, D22, D31, D32) from a list of display data (D11, D21, D22, D31, D32) displayed at the display device to select the broadcasting station corresponding to the selected display data (D11, D21, D22, D31, D32). 9. multimedia system according to one of claims 7 and 8, characterized in that it comprises a database (23) stored on an electronic memory (24) external to the radio receiver, containing a correspondence table (25) associating at each entry (E) of the table constituted by a given identification code, an output (S) of the table consisting of at least one display data item listed in the table, a means of communication between the database and the radio receiver (17) allowing the processing unit of the radio receiver to read the table (25), select an input (E) and extract an output (S). 10. Motor vehicle equipped with a multimedia system according to one of claims 7 to 9.